This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A377996 #6 Nov 16 2024 07:25:46 %S A377996 2,7,7,6,7,2,8,8,2,5,4,7,6,3,1,0,0,5,6,7,3,5,2,4,5,0,5,3,3,7,2,8,4,2, %T A377996 5,3,6,4,9,8,9,1,6,4,4,2,3,5,1,2,4,8,9,7,5,6,2,0,4,6,9,8,4,6,5,7,6,9, %U A377996 0,6,9,5,6,4,5,2,8,2,5,4,2,9,2,3,0,2,9,3,1,2 %N A377996 Decimal expansion of the dihedral angle, in radians, between triangular and square faces in a (small) rhombicosidodecahedron. %C A377996 Also the dihedral angle, in radians, between square and hexagonal faces in a truncated icosidodecahedron (great rhombicosidodecahedron). %H A377996 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GreatRhombicosidodecahedron.html">Great Rhombicosidodecahedron</a>. %H A377996 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SmallRhombicosidodecahedron.html">Small Rhombicosidodecahedron</a>. %F A377996 Equals arccos(-(sqrt(3) + sqrt(15))/6) = arccos(-(A002194 + A010472)/6). %e A377996 2.7767288254763100567352450533728425364989164423512... %t A377996 First[RealDigits[ArcCos[-(Sqrt[3] + Sqrt[15])/6], 10, 100]] (* or *) %t A377996 First[RealDigits[Max[PolyhedronData["Rhombicosidodecahedron", "DihedralAngles"]], 10, 100]] %Y A377996 Cf. A002194, A010472, A377995. %K A377996 nonn,cons,easy %O A377996 1,1 %A A377996 _Paolo Xausa_, Nov 15 2024